I understood from Mike Anshel that he was rather proud of this, though of course I never asked Dennis myself.
I wonder if Harvard would posthumously enter it in the books if someone dropped off a bound copy now?
I imagine somehow Dennis wouldn't appreciate that.

On Thu, Jul 30, 2020 at 8:23 PM Kirk McKusick <mckusick@mckusick.com> wrote:
The Computer History Museum has an interesting blog post about
Dennis Ritchie's lost dissertation:

https://computerhistory.org/blog/discovering-dennis-ritchies-lost-dissertation/

Interesting fact is that Dennis never received his PhD because he failed
to provide a bound copy of his dissertation to the Harvard library.

        Kirk McKusick